Question Discussion & Solution

The correct answer is 1526.

• The first battle of Panipat was fought in 1526.

Key Points

• The First Battle of Panipat (21 April 1526) fought near a small village of Panipat Haryana.
• The battle was fought between the invading forces of Zahir-ud-din Babur and Lodi Empire during the rule of Ibrahim Lodi.
• The Mughal forces of Babur, the ruler of Kabulistan, defeated the ruling army of Ibrahim Lodi, Sultan of Delhi.
• Babur’s tactics of Tulughma and Araba led him to victory.

Additional Information

• Tulughma: it means dividing the whole army into various units, viz. the Left, the Right and the Centre.
• Araba: The centre forward division was then provided with carts which were placed in rows facing the enemy and tied to each other with animal. 
• The Second Battle of Panipat was fought between the forces of Samrat Hem Chandra Vikramaditya and  the army of Akbar, on November 5, 1556
• The Third Battle of Panipat took place on 14 January 1761, at Panipat between the Maratha Empire and the King of Afghanistan, Ahmad Shah Durrani.

The correct answer is four.

Key Points

• Crocodiles have four-chamber hearts. All reptiles have incomplete four-chamber hearts except Crocodiles.

Additional Information

• Endotherm or Homeotherm have well developed four-chamber heart. Examples:- Birds and mammals. 
  • They can maintain constant body temperature.
• Poikilotherm or Ectotherm do not have a well-developed heart, so they can not maintain constant body temperature. Examples:- Amphibians and reptiles.
• Fishes have a two-chamber heart.
• Amphibians have three-chamber heart.
• The cockroach has thirteen chamber hearts.

The input device is any hardware used by a human operator or other systems to communicate with a computer. 

Input Device: A piece of equipment/hardware that helps us enter data into a computer is called an input device. 

Examples of an Input device:

Keyboard, mouse, scanner, joystick, etc.

Additional Information

The correct answer is ​Red and yellow soil.

Key Points

• Red and Yellow Soil:
  • Red soil develops on crystalline igneous rocks in areas of low rainfall in the eastern and southern part of the Deccan Plateau. Hence option 1 is correct.
  • Along the piedmont zone of the Western Ghat, a long stretch of area is occupied by red loamy soil.
  • Yellow and red soils are also found in parts of Odisha and Chhattisgarh and in the southern parts of the middle Ganga plain.
  • The soil develops a reddish colour due to a wide diffusion of iron in crystalline and metamorphic rocks.
  • It looks yellow when it occurs in a hydrated form.
  • The fine-grained red and yellow soils are normally fertile, whereas coarse-grained soils found in dry upland areas are of poor infertility.
  • They are generally poor in nitrogen, phosphorous and humus.

The correct answer is Khejri.

Key Points
Khejri:

• It is known as Kalp Vriksha of desert.
• Prosopis cineraria is the scientific name.
• It was declared a state tree in the year 1983.
• It has a nitrogen-fixing tree which enhances the fertility of the soil.
• In 1988, the Indian Postal Department issued a Postal Stamp of paisa 60 on Khejri. 
• Khejri trees are found in the tropical thorny forest.